missing cover art
In the German gaming magazine PC Player (issue 01/1994) Ultima Underworld II: Labyrinth of Worlds was named "Best Game of 1993".
In Nystul's library in the castle, you'll find one of the chests is locked and can't be opened.
Apparently, the Florida Department of Corrections have adopted the Virtues of the Guardian as their official virtues.
The cat-like Trilkhai, which bear the suspicious resemblance to the Kilrathi, have yet another thing in common. The word 'Trilkhai' is an anagram (uh... you rearrange the letters, see?) of the word 'Kilrathi'.
In Killorn Keep there is a cat like creature called Blackie that you can talk to. He tells you the story of his race, the Trilkhai, which has a striking resemblance to the Kilrathi of the Wing Commander games (also by Origin). The other Ultima game released around the same time (Ultima 7) also has a reference to the Kilrathi and it has been infered that the space ships fought in Ultima 1 are actually Kilrathi fighters.
If you delete the shades.dat in the DATA subdirectory, you don't need torches or lamps in your quest any more due to the lack of shade maps. (Of course, this also means that every single environment you're in looks like daylight, which ruins the mood -- Ed.)